


Precautions for operation, maintenance and performance optimization of building web servers on CentOS
Operation, maintenance and performance optimization considerations for building a web server on CentOS
With the rapid development of the Internet, building your own web server has become an issue for more and more companies and individuals. needs. As a free and stable operating system, CentOS has become the first choice of many people. This article will introduce some operation and maintenance and performance optimization considerations when building a web server on CentOS, and provide some code examples.
- Installing and Configuring Apache
First, we need to install Apache as our web server. In CentOS, you can use the following command to install:
yum install httpd
After the installation is complete, we need to do some configuration. Open Apache's main configuration file httpd.conf
, usually located at /etc/httpd/conf/httpd.conf
, and make the following settings:
- Modify
ServerName
, set the domain name or IP address of the server. - Modify
DocumentRoot
and set the root directory of the website. - Configure a virtual host (if required) by adding the
<VirtualHost>
tag.
After the configuration is completed, use the following command to start Apache:
systemctl start httpd
- Firewall settings
In order to protect the security of the server, we need to set firewall rules . CentOS uses firewalld
to manage firewalls. The following are some commonly used commands:
Check the firewall status:
systemctl status firewalld
Copy after loginTurn on the firewall:
systemctl start firewalld
Copy after loginAdd allowed ports:
firewall-cmd --permanent --add-port=80/tcp
Copy after loginRestart the firewall:
firewall-cmd --reload
Copy after login
- ##Install and configure MySQL
yum install mysql-server
systemctl start mysqld systemctl enable mysqld
mysql_secure_installation
- PHP Configuration
php-fpm for installation and configuration. The following are the installation steps:
- Install PHP and related extensions:
yum install php php-fpm php-mysql
Copy after loginModify the - php.ini
file and find the
date .timezoneand set the time zone.
- Start php-fpm:
systemctl start php-fpm systemctl enable php-fpm
Copy after login
- Performance optimization considerations
- Use HTTP caching to reduce server load. Caching can be enabled by adding the following configuration in
httpd.conf
:
LoadModule cache_module modules/mod_cache.so <IfModule mod_cache.c> CacheEnable disk / </IfModule>
Copy after login - Compresses transmitted data to reduce network transmission time. You can add the following configuration in
httpd.conf
:
LoadModule deflate_module modules/mod_deflate.so <IfModule mod_deflate.c> SetOutputFilter DEFLATE </IfModule>
Copy after login Reasonably configure the number of Apache processes and threads, and adjust them according to the actual situation. Use the index of the database to speed up the query. Use CDN (Content Delivery Network) to distribute server load and improve access speed.
- Sample code
<?php $servername = "localhost"; $username = "root"; $password = "your_password"; $dbname = "your_database"; $conn = new mysqli($servername, $username, $password, $dbname); if ($conn->connect_error) { die("Connection failed: " . $conn->connect_error); } $sql = "SELECT * FROM your_table"; $result = $conn->query($sql); if ($result->num_rows > 0) { while($row = $result->fetch_assoc()) { echo "Name: " . $row["name"]. "<br>"; } } else { echo "0 results"; } $conn->close(); ?>
The above is the detailed content of Precautions for operation, maintenance and performance optimization of building web servers on CentOS. For more information, please follow other related articles on the PHP Chinese website!

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